References Maxwell-based Permanent Magnet Synchronous Motor Short Circuit Faults and Electromagnetic Losses

Permanent magnet synchronous motor (PMSM) is a type of motor that is widely used in industrial production, possessing the high efficiency of permanent magnet motor and the precise control characteristics of synchronous motor. With the increase of the motor running time and the change of the external environment, it may lead to the damage of the insulation layer of the stator-side windings, resulting in the turn-to-turn short-circuit faults, which will have an adverse effect on the performance of the motor. In this paper, a 15KW water pump PMSM is selected, and the PMSM model is established by Ansys Maxwell finite element analysis software to study and analyse the relationship between stator side winding turn-to-turn short-circuit and electromagnetic loss, and compare the electromagnetic loss waveforms of the motor in normal operation and various turn-to-turn short-circuit conditions, and the analysis results show that the electromagnetic loss increases the most when the number of short-circuit turns is six. When the stator winding is short-circuited for five turns, the stator's iron consumption increases the most. In the case of a six-turn short circuit, the eddy current loss of the permanent magnet grows the most, and the copper consumption of the stator decreases the most. This provides a reference basis for motor short circuit fault diagnosis and preventive maintenance.